Burglar stop



Aug. 19, 1947.

W. HILTON BURGLAR STOP- Filed Nov. 26, 1945 Gigi J m Wm H Wm H w W .L MW Patented Aug. 19, 194'? UNITED STATES PATENT OFFICE BURGLAR STOPWilliam Hilton, Seattle, Wash.

Application November 26, 1945, Serial No. 630,757

This invention relates to window locks or what are sometimes referred toas burglar stops, and it has reference more particularly to devices ofthat character designed to be applied to sliding sash windows todefinitely limit the distance to which a window may be opened.

It is the principal object of this invention to provide a device of thecharacter above stated comprising a plate designed to be fixed to onesash of the window and a stop element that may be adjusted to andsecured at different locations on the plate, to be engaged by the othersash when it is moved toward an open position.

It is also an object of the invention to provide a device of the kindabove stated, wherein the stop member limits the extent to which thewindow may be opened to a distance less than that required for a personto enter therethrough and may not be released by one at the outside ofthe window and may not be removed from the plate for opening the windowto its full extent except while the window is completely closed.

Other objects and advantages of the invention reside in the details ofconstruction of the parts of the device and in their mode of assemblyand use as will hereinafter be fully described.

In accomplishing these and other objects of the invention, I haveprovided the improved details of construction, the preferred forms ofwhich are illustrated in the accompanying drawings, Wherein Fig. l is anelevation showing parts of the upper and lower sliding sashes of atypical window to which a burglar stop, embodied by this invention, isapplied.

Fig. 2 is a front view of the burglar stop.

Fig. 3 is a central, longitudinal section of the same as affixed to awindow sash.

Fig. 4 is a perspective view of the stop element of the deviceillustrating its securing stud.

Fig, 5 is an enlarged fragmental view of parts of the device, showingthe upper end portion of the stop member partially broken away forbetter illustration of its holding stud and indicating, in dotted lines,the position to which the stop element is required to be turned relativeto the base plate, in order that it may be shifted to a differentlocation on the plate.

Fig. 6 is an enlarged, cross section on line 6-6 in Fig. 2.

Referring more in detail to the drawings In Fig. 1, l0 and II,respectively, designate parts of the upper and lower sliding sashes of atypical form of a residence window; it being understood that thesesashes are held slidably in a window frame of a suitable kind, a part ofwhich 3 Claims. (Cl. 292342) is designated at I2 in Fig. 1, and that theguideways in which the sashes slide are separated by a stop stripdesignated by reference character I3, as in Figs. 3 and 6.

The purpose of the present device, referred to as a burglar stop, is tolimit the extent to which the lower sash may be raised or the upper sashlowered to a distance less than that required for a person to gain entrythrough the window, but sufficient for ventilation or fresh air entry.

In its present preferred form of construction, the device comprises aflat, elongated base plate l5, preferably of metal, that is formed nearits upper and lower ends, and at intermediate points if so desired, withholes l6 for reception of securing screws. In Fig. 3, such screws aredesignated by reference character ll.

Formed about the marginal edges of the plate l5, on its inside, are ribsor flanges l8, designed to space the body portion of the metal plateoutwardly from the surface of the part to which it may be applied, aswill best be understood by reference to Figs. 3 and 6.

Formed in the plate I5, lengthwise thereof, is a slot 2!] of uniformwidth. This slot is formed at regularly spaced intervals therealong withcircular enlargements, as at 2|, one of which is at the upper end of theslot. At its lower end, the slot 29 terminates in a circular enlargement22 that is of substantially greater diameter than the enlargements 2|for a purpose presently explained.

The stop member that is associated with the base plate, is designated inits entirety by reference numeral 25. This comprises a metal block ofwedge-like form, provided with a flat inside surface 25a designed to beengaged flatly against the outer surface of the base plate, lengthwisethereof and to be secured in a downwardly pointed position thereon, aswill be understood by its showing in Fig. 3.

Fixed in the stop member 25, near its upper or thicker end, andextending inwardly from the flat inner surface 25a thereof, is asecuring stud 21, formed with a flat anchoring head 28. The stud 21 isflattened at top and bottom surfaces, as shown best in Fig. 5, whereinthe cross sectional view shows it to have a thickness or diameter in thevertical direction that is slightly less than the width of the slot 26,and it has a transverse diameter or thickness greater than lower endenlargement 22 and may be passed therethrough. Also extending from theinner face of the stop member, but near its lower end, is a short stud30. Thi is of such diameter that it will be received within the slot 20and the purpose of this stud is to prevent any lateral displacement ofthe lower end of the stop member from its holding position.

Assuming thedevice to be so constructedit is applied'and used asfollows:

First, with both window sashes shifted to closed positions, the baseplate I5 is applied lengthwise to one of the vertical stiles of theupper sash with its lower end terminating about at the level of thelower edge of the glass panel in the upper sash, and is secured byapplying screws 1! through the holes I6. The stop member 25 is thenapplied to the base plate by turning it to. a horizontally extendingposition, as indicated by s PPWW al .5. 513- 5, and h P i h ra Port o%of t e anchor t d h u the opening or enlargement 22 at the. lower endof the slot 29; it being understood that the head the tud i s t di me erhat t. w l; n a re an of the openi Zl- Af ter the stud headhas beenpassed through the plate opening 2 2 the stop, still in horizontalposition, may be, moved upwardly along the base plat to an o the e te sp p sition which are established by the enlargements 2 I; in the slot28, then turned to a vertical position, and its flat inside surface 259seated flatly against the base plate with the short stud 30 disposed t nthe lat 0- It w be nder t od. hat W n the st p, aft r being applied tothe plate, is turned to the horizontal po t h t may hen. e ecu in theslot for movement. therealong. When he t d; s a hed ne f t e lar ents.2| n h s t t n he t p my e ta d d wn to the holding position, and thisturns the stud crosswise of the slot and; causes it to be retained inthe enl rgement 2| as shown in Fig. 5. The anchoring stud cannot beunseated because head 28; cannot bepassed through the slot 20 or any o te n a gem nt 21- Should the lower sash be raised. or the top sashlowered, the, stop Z5 will wedge against the top rail of the bottomsash, as illustrated in Fig. 3, thus to limit the extent of openingofthe window in accordance with the position at whiohthe stop has beenset.

order that the window may be opened completely, it is necessary first tocompletely close both sashes, then, to swing the stopmember 2-5; to ahorizontal position and shift it along slot 29 to the lower end of theplate l5 and withdraw the anchoring stud 21 from the plate by passingthe head 28 outwardly through the lower end enlargement 22 of the slotWith the stop removed, the Window sashes are free for up and downadjustment to full extent permitted by the window frame.

With the present device, the extent of opening of a. window may belimited to a few inches, or distances for desired ventilation withoutmaking possible the release of the stop and raising of the window by oneoutside the window.

A feature of importance is the provision of. means. requiring that thewindows be entirely closedbefore the stop can be removed for completeopening of; thewindow.

Having thus described my invention, what. I claim as new therein anddesire to secure by Letters Patent is:

1. A device of the character described comprising a plate adapted to befixed adjacent the path of travel of a slidably mounted window andhaving a slot formed therein in the direction of window travel; saidslot being formed, at intervals therealong, with enlargements, a stopmember applied to the outer face of the said Plate a a a ed to beengaged. by th window to limit its opening movement; said stop memberhaving an anchor stud extended inwardly therefrom and through said slotwithin one of the slot enlargements and a head at the inner end of thestud for engaging the inner face of the plate to retain the stud againstwithdrawal from the slot, and said stud having a transverse thickness,substantially fitting the slot enlargement to prevent movement of thestop along the plate when in a window holding position, and having avertical thickness that is lesser than the width or the slot, whereby,upon turning the stop member to a position transversely of the slot, thestud is movable along the. slot, for the. dis: position ofthe stop at,any. selected holding position.

2. A device as recited in claim 1- wherein the stop member is in theform of an elongated wedge, and wherein the. anchor stud extendsinwardly from that end portion of greater thick: ness and a short studextends inwardly from the inner face of the thinner end portion of thestop member into the slot to retain. the. stop against lateral turning:when a window is. engagedagainst the outer surface. of the stop member.

'3 A window stop device comprising a. plate. dap e to e x d adja ent hepath. of. travel of a slidably mountedg window and; having a slot formedtherein in the. direction of window, rave nd saidslo av n ar m t aspaced intervals therealong, a stop member oiwedge-like form applied tothe outer face of the said plate and adaptedtobe engaged: along; its utz e e b5; h Wind w t m t. ts ope i ncr n a i st me ber a n a n hord ndenwar y i qm. ts ge end. through sa sl thin n of; said nlarg nts. t e a.d; said t d en agin h inside of h P at en Pr nt n with rawal. r the d. oh lot. a or tud: extendin m the Stop i he l t; t r v nt. at ral. ur n ofthe stop member while a window is. engaged. thereagainst; ai a hor-Studav n at an th ne u stae a lr fi n s o largementtoprevent; movement ofthe stop along; the slot when it is in holding position, and having avertical thicknessless than the width of the slot permitting adjustmentoi the stop along the plate slot when the stop. is turned transverselythereto, for-the disposition of the stop. at any selected. stoppingposition; and there being an enlargement at one end ofthe slot andthrough which the head of the anchor stud, may be. passed for; removalof. the stop from, the plate.

W LL A t LrQN mamas... CITED,-

The following references: are oi recordinthe file of this patent:-

UNITED srmrns PATENTS Number Name Date 518,253v Kimball Apr. 17, 1894866,565. Bellamy Sept. 17, 1907 895,808. Steele Aug. 1-1, 1908 1,111,585Hunt. Sept. 22, 1914:

